NSURL连接会/不会加载数据

Question

因此，这里是我的问题：

我跟着iPhone开发者文档几乎到T的NSURLConnection tutorial，它只是有点工作。

这里就是这一切都错了：
对象似乎是正确的，并委托给connectionDidFinishLoading创建的，但任何URL我尝试加载的响应数据最终总是只为0字节。如果这有什么不同，我正在模拟器中运行。

这里是我的相关代码：

- (void)viewDidLoad { 
    [super viewDidLoad]; 
    self.title = @"WVFS Player"; 

    //create a request 
    NSURLRequest *theRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://wvfs.josh-kaplan.com/nowPlaying.php"] 
               cachePolicy:NSURLRequestUseProtocolCachePolicy 
              timeoutInterval:60.0]; 
    // create a connection 
    NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:theRequest delegate:self]; 

    if(theConnection) { 
     // create the datum 
     responseData=[[NSMutableData data] retain]; 
    } else { 
     // code this later 
    } 
} 

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response 
{ 
    [responseData setLength:0]; 
} 

- (void)connectionDidFinishLoading:(NSURLConnection *)connection 
{ 
    // make it work 
    NSLog(@"Succeeded! Received %d bytes of data:",[responseData length]); 

    // release it 
    [connection release]; 
    [responseData release]; 
} 

这是我的日志输出：

[Session started at 2010-03-14 09:01:09 -0400.] 
2010-03-14 09:01:14.784 WVFS[19571:207] Succeeded! Received 0 bytes of data: 

任何想法？

Answer 1

你忘了执行connection:didReceiveData:

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { 
    [responseData appendData:data]; 
}